Porphyry-Related Metamorphosed Au-Ag and Cu-Mo Deposits in the Precambrian of the Fennoscandian Shield
The Pellapahk Cu-Mo and Oleninskoe Au-Ag deposits in the western segment of the Russian Arctic in the Kolmozero–Voronya greenstone belt are considered two parts of an Archean (2.83–2.82 Ga) porphyry-epithermal system, probably the oldest one defined in the Fennoscandian Shield. Formation of the Olen...
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MDPI AG
2021
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ftdoajarticles:oai:doaj.org/article:7a2e5ee6bed047bf95153457de5444ad 2024-01-07T09:41:47+01:00 Porphyry-Related Metamorphosed Au-Ag and Cu-Mo Deposits in the Precambrian of the Fennoscandian Shield Arkadii A. Kalinin Nikolay M. Kudryashov 2021-01-01T00:00:00Z https://doi.org/10.3390/min11020139 https://doaj.org/article/7a2e5ee6bed047bf95153457de5444ad EN eng MDPI AG https://www.mdpi.com/2075-163X/11/2/139 https://doaj.org/toc/2075-163X doi:10.3390/min11020139 2075-163X https://doaj.org/article/7a2e5ee6bed047bf95153457de5444ad Minerals, Vol 11, Iss 2, p 139 (2021) Fennoscandian Shield Kolmozero–Voronya belt Oleninskoe Au-Ag deposit Pellapahk porphyry deposit alteration gold silver Mineralogy QE351-399.2 article 2021 ftdoajarticles https://doi.org/10.3390/min11020139 2023-12-10T01:42:15Z The Pellapahk Cu-Mo and Oleninskoe Au-Ag deposits in the western segment of the Russian Arctic in the Kolmozero–Voronya greenstone belt are considered two parts of an Archean (2.83–2.82 Ga) porphyry-epithermal system, probably the oldest one defined in the Fennoscandian Shield. Formation of the Oleninskoe Au-Ag deposit at the epithermal stage of the system is indicated by the spatial and genetic relationships with the sills of granite porphyry, the geochemical association of ore elements (Au, Ag, Cu, Pb, Sb, As), an Au/Ag ratio of <0.2, and the multiplicity of silver mineralization with different Ag, Cu, Pb, Sb sulfosalts. The geological–structural characteristics of the Oleninskoe and the Pellapahk, i.e., their location in a shear zone, the morphology and size of ore bodies, the scale of the deposits, and the intensity and zoning of rock alteration, do not oppose this model. Mineralized rocks of the Pellapahk Cu-Mo and Oleninskoe Au-Ag deposits were amphibolite metamorphosed in the Neoarchean and again in the Paleoproterozoic. Structures of sulfide melt crystallization formed in the ores during metamorphism, those are fine intergrowths of galena, argentotetrahedrite, pyrargyrite, pyrrhotite, ullmannite, stutzite, and other mineral phases of low-melting-point metals such as Ag, Cu, Pb, Sb, As, Bi. Article in Journal/Newspaper Arctic Fennoscandian Directory of Open Access Journals: DOAJ Articles Arctic Minerals 11 2 139 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Fennoscandian Shield Kolmozero–Voronya belt Oleninskoe Au-Ag deposit Pellapahk porphyry deposit alteration gold silver Mineralogy QE351-399.2 |
spellingShingle |
Fennoscandian Shield Kolmozero–Voronya belt Oleninskoe Au-Ag deposit Pellapahk porphyry deposit alteration gold silver Mineralogy QE351-399.2 Arkadii A. Kalinin Nikolay M. Kudryashov Porphyry-Related Metamorphosed Au-Ag and Cu-Mo Deposits in the Precambrian of the Fennoscandian Shield |
topic_facet |
Fennoscandian Shield Kolmozero–Voronya belt Oleninskoe Au-Ag deposit Pellapahk porphyry deposit alteration gold silver Mineralogy QE351-399.2 |
description |
The Pellapahk Cu-Mo and Oleninskoe Au-Ag deposits in the western segment of the Russian Arctic in the Kolmozero–Voronya greenstone belt are considered two parts of an Archean (2.83–2.82 Ga) porphyry-epithermal system, probably the oldest one defined in the Fennoscandian Shield. Formation of the Oleninskoe Au-Ag deposit at the epithermal stage of the system is indicated by the spatial and genetic relationships with the sills of granite porphyry, the geochemical association of ore elements (Au, Ag, Cu, Pb, Sb, As), an Au/Ag ratio of <0.2, and the multiplicity of silver mineralization with different Ag, Cu, Pb, Sb sulfosalts. The geological–structural characteristics of the Oleninskoe and the Pellapahk, i.e., their location in a shear zone, the morphology and size of ore bodies, the scale of the deposits, and the intensity and zoning of rock alteration, do not oppose this model. Mineralized rocks of the Pellapahk Cu-Mo and Oleninskoe Au-Ag deposits were amphibolite metamorphosed in the Neoarchean and again in the Paleoproterozoic. Structures of sulfide melt crystallization formed in the ores during metamorphism, those are fine intergrowths of galena, argentotetrahedrite, pyrargyrite, pyrrhotite, ullmannite, stutzite, and other mineral phases of low-melting-point metals such as Ag, Cu, Pb, Sb, As, Bi. |
format |
Article in Journal/Newspaper |
author |
Arkadii A. Kalinin Nikolay M. Kudryashov |
author_facet |
Arkadii A. Kalinin Nikolay M. Kudryashov |
author_sort |
Arkadii A. Kalinin |
title |
Porphyry-Related Metamorphosed Au-Ag and Cu-Mo Deposits in the Precambrian of the Fennoscandian Shield |
title_short |
Porphyry-Related Metamorphosed Au-Ag and Cu-Mo Deposits in the Precambrian of the Fennoscandian Shield |
title_full |
Porphyry-Related Metamorphosed Au-Ag and Cu-Mo Deposits in the Precambrian of the Fennoscandian Shield |
title_fullStr |
Porphyry-Related Metamorphosed Au-Ag and Cu-Mo Deposits in the Precambrian of the Fennoscandian Shield |
title_full_unstemmed |
Porphyry-Related Metamorphosed Au-Ag and Cu-Mo Deposits in the Precambrian of the Fennoscandian Shield |
title_sort |
porphyry-related metamorphosed au-ag and cu-mo deposits in the precambrian of the fennoscandian shield |
publisher |
MDPI AG |
publishDate |
2021 |
url |
https://doi.org/10.3390/min11020139 https://doaj.org/article/7a2e5ee6bed047bf95153457de5444ad |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Fennoscandian |
genre_facet |
Arctic Fennoscandian |
op_source |
Minerals, Vol 11, Iss 2, p 139 (2021) |
op_relation |
https://www.mdpi.com/2075-163X/11/2/139 https://doaj.org/toc/2075-163X doi:10.3390/min11020139 2075-163X https://doaj.org/article/7a2e5ee6bed047bf95153457de5444ad |
op_doi |
https://doi.org/10.3390/min11020139 |
container_title |
Minerals |
container_volume |
11 |
container_issue |
2 |
container_start_page |
139 |
_version_ |
1787422579716259840 |